forked from OSchip/llvm-project
42 lines
2.0 KiB
LLVM
42 lines
2.0 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt %s -loop-vectorize -instcombine -simplifycfg -mtriple=x86_64-unknown-linux-gnu -mcpu=skylake-avx512 -S | FileCheck %s
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@bytes = global [128 x i8] zeroinitializer, align 16
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; FIXME: We should end up with vector code for this loop, but don't because
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; we try to create VF=64,UF=4 loop, but the scalar trip count is only 128 so
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; the vector loop becomes dead code leaving only a scalar remainder.
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define zeroext i8 @sum() {
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; CHECK-LABEL: @sum(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[INDVARS_IV_NEXT:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[R_010:%.*]] = phi i8 [ 0, [[ENTRY]] ], [ [[ADD:%.*]], [[FOR_BODY]] ]
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds [128 x i8], [128 x i8]* @bytes, i64 0, i64 [[INDVARS_IV]]
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; CHECK-NEXT: [[TMP0:%.*]] = load i8, i8* [[ARRAYIDX]], align 1
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; CHECK-NEXT: [[ADD]] = add i8 [[TMP0]], [[R_010]]
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; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
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; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[INDVARS_IV_NEXT]], 128
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; CHECK-NEXT: br i1 [[EXITCOND]], label [[FOR_END:%.*]], label [[FOR_BODY]], !llvm.loop !0
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; CHECK: for.end:
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; CHECK-NEXT: ret i8 [[ADD]]
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;
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entry:
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br label %for.body
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%r.010 = phi i8 [ 0, %entry ], [ %add, %for.body ]
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%arrayidx = getelementptr inbounds [128 x i8], [128 x i8]* @bytes, i64 0, i64 %indvars.iv
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%0 = load i8, i8* %arrayidx, align 1
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%add = add i8 %0, %r.010
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 128
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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%add.lcssa = phi i8 [ %add, %for.body ]
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ret i8 %add.lcssa
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}
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